Foundation Isolation for Seismic Protection Using a Smooth Synthetic Liner
Authors:
- 1 November 2004
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Geotechnical and Geoenvironmental Engineering
- Vol. 130 (11) , 1121-1130
Abstract
Smooth synthetic materials placed underneath foundations of structures can provide seismic protection by absorbing energy through sliding. Cyclic and shaking table tests were conducted on a variety of synthetic interfaces to identify a suitable liner for use as foundation isolation. It was concluded that a high strength, nonwoven geotextile placed over an ultrahigh molecular weight polyethylene, UHMWPE (geotextile/UHMWPE) constitutes a liner that is well suited for this application. The static friction coefficient of the interface (between the geotextile and the UHMWPE) is about 0.1. The dynamic coefficient is about 0.07 and is insensitive to changes in slip rate and normal stress. A single-story structural model with and without foundation isolation was tested using a shaker table. The results demonstrate the role of foundation isolation in substantially reducing the seismic shear forces in the model. Accompanying this reduction in shear forces are slip displacements along the isolation liner. Permanent ...Keywords
This publication has 3 references indexed in Scilit:
- Soil Isolation for Seismic Protection Using a Smooth Synthetic LinerJournal of Geotechnical and Geoenvironmental Engineering, 2004
- Earthquake-Resistant Design with Rubber1997
- Dynamic Interface Shear Strength Properties of Geomembranes and GeotextilesJournal of Geotechnical Engineering, 1992